| 摘要 |
The invention is intended for the repair of damaged drains in wells with horizontal drains which serve for the supply of water. The damage of the drain arises usually on the weld and where the radial movement of the drain occurs. Through the opening the sand and gravel break through, so the drain closes, completely or partially, thus reducing the productivity of the well. The elastic drainage pipe (1) thanks to the slit (6) can be imprinted onto the damaged place where with it's elastic force and ratchet (7)is held and tightened.The opening (4) on the central part (3) enables a radial movement of filled parts (2) on the end of the pipes (1) so that they are left close to the drains thus stopping the break through of sand on that end, while the rods (5) secure the flow of water through the drain. Imprinting of elastic drainage pipes (1) on the place of damage is performed while in a distorted state by bending around the axis. |
